/**
 * Copyright Pravega Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.pravega.segmentstore.server.host.health;

import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.Service;
import io.pravega.segmentstore.server.SegmentContainer;
import io.pravega.shared.health.Health;
import io.pravega.shared.health.Status;
import io.pravega.shared.health.impl.AbstractHealthContributor;
import lombok.NonNull;


/**
 *  A contributor to manage health of Segment Container.
 */
public class SegmentContainerHealthContributor extends AbstractHealthContributor {
    private final SegmentContainer segmentContainer;

    public SegmentContainerHealthContributor(@NonNull SegmentContainer segmentContainer) {
        super("SegmentContainer");
        this.segmentContainer = segmentContainer;
    }

    @Override
    public Status doHealthCheck(Health.HealthBuilder builder) {
        Status status = Status.DOWN;

        if (segmentContainer.state() == Service.State.NEW) {
            status = Status.NEW;
        }

        if (segmentContainer.state() == Service.State.STARTING) {
            status = Status.STARTING;
        }

        if (segmentContainer.state() == Service.State.RUNNING) {
            status = Status.UP;
        }

        builder.details(ImmutableMap.of("Id", segmentContainer.getId(), "ActiveSegments", segmentContainer.getActiveSegments()));
        return status;
    }
}
